Certainly! Here's a revised version of your statement:
"Yes, we offer refurbished mattresses for sale. Refurbished mattresses are those that have been returned within 30 nights and undergo a thorough cleaning process. Additionally, a new cover is added to ensure freshness and cleanliness."
"All our refurbished mattresses are delivered fully expanded. Due to the nature of the refurbishment process, we cannot re-roll a previously opened mattress. Rest assured, when you receive your refurbished mattress, it will be in its fully expanded form and ready to use."